<!DOCTYPE html>
<canvas id='output0' width='100' height='100'></canvas>
<canvas id='output1' width='100' height='100'></canvas>
<canvas id='output2' width='100' height='100'></canvas>
<canvas id='output3' width='100' height='100'></canvas>
<canvas id='output4' width='100' height='100'></canvas>
<canvas id='output5' width='100' height='100'></canvas>
<canvas id='output6' width='100' height='100'></canvas>
<canvas id='output7' width='100' height='100'></canvas>
<canvas id='output8' width='100' height='100'></canvas>
<canvas id='output9' width='100' height='100'></canvas>
<canvas id='output10' width='100' height='100'></canvas>
<canvas id='output11' width='100' height='100'></canvas>

<script>
var patternCanvas = document.createElement('canvas');
patternCanvas.width = 30;
patternCanvas.height = 30;
var patternCtx = patternCanvas.getContext('2d');
patternCtx.fillStyle = '#A00';
patternCtx.fillRect(0, 0, 15, 15);
patternCtx.fillStyle = '#0A0';
patternCtx.fillRect(15, 0, 15, 15);
patternCtx.fillStyle = '#00A';
patternCtx.fillRect(0, 15, 15, 15);
patternCtx.fillStyle = "#AA0";
patternCtx.fillRect(15, 15, 15, 15);

var paint = function(id, filter) {
  var c = document.getElementById(id);
  var ctx = c.getContext('2d');
  ctx.filter = filter;
  ctx.drawImage(patternCanvas, 5, 5);
  ctx.drawImage(patternCanvas, 35, 35);
  ctx.drawImage(patternCanvas, 65, 65);
  return ctx;
};

paint('output0', "none");
paint('output1', "blur(10px)");
paint('output2', "brightness(40%)");
paint('output3', "contrast(20%)");
paint('output4', "drop-shadow(0 0 5px green)");
paint('output5', "grayscale(100%)");
paint('output6', "invert(100%)");
paint('output7', "opacity(50%)");
paint('output8', "saturate(20%)");
paint('output9', "sepia(100%)");
paint('output10', "sepia(1) hue-rotate(200deg)");
paint('output11', "url(#url)");
</script>
